Powertrain Controls - ECM/PCM

*** UPDATED BY TSB 416516, DATED AUGUST, 1994

DTC 11 Chart:

Malfunction Indicator Lamp Circuit.:

CIRCUIT DESCRIPTION
There should always be a steady Malfunction Indicator Lamp (MIL) with the ignition "ON" and engine stopped. ignition voltage is supplied directly to the bulb on CKT 39. The Powertrain Control Module (PCM) controls the light by providing the ground path through CKT 419.

DTC 11 WILL SET WHEN:
The PCM detects the wrong voltage potential on CKT 419 for 26 seconds.

ACTION TAKEN (PCM Will Default To):
None.

DTC CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.

1. If CKT 419 is open or ignition feed circuit to the bulb is open, the Malfunction Indicator Lamp (MIL) will not illuminate.
2. Use J 35616-A tool kit to probe PCM harness terminals, so that you do not damage them.
3. The MIL should go "OFF" after the engine starts. If it does, the problem is not present at this time. if not, CKT 419 is shorted to ground between the PCM and MIL or the PCM is faulty.
4. If other DTCs are displayed along with DTC 11, repair other DTCs first, then restart at the beginning of this chart.

DIAGNOSTIC AIDS
If ignition feed circuit is suspected of being open, check and see if other bulbs on that circuit illuminate.

The MIL will be "ON" if DTC 11 is stored and the MIL circuit becomes operational.